What ratio do I need? I'm actually thinkin 3.73 might be perfect, 3.55 has nowhere near enough balls for how I use my trucks, but 4.10 makes the rpms howl goin down the highway(unless I go with 37's, hmmmm...)

3.73 work great even towing IF you got HP...I have 450HP by turning the chip up so can use the HP for short bursts passing if needed. But if I had my choice I'd have 4.10's runing 35" tires. 7.3's at 2000rpm @70+- is perfect.

^Agreed on Cary's engine power math. Our engines like to hum and cruise with a load above 2000rpm. With my hauling needs it is looking more and more like I need a second truck (and win the lottery) so that I could dump it and Cary's and pick it up in a couple months with everything I want to have fun.

^Agreed on Cary's engine power math. Our engines like to hum and cruise with a load above 2000rpm. With my hauling needs it is looking more and more like I need a second truck (and win the lottery) so that I could dump it and Cary's and pick it up in a couple months with everything I want to have fun.

Its always seemed to me that my MPG's start nosediving when I go above 2k maybe its my tired injectors

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